body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
    monospace;
}

*{
  margin: 0;
  padding:0;
}

body,html,#root {
  width: 100%;
  height: 100%;
}

#root {
  display:flex;
}
#controlBoxLeft{
  width: 20%;
  background:#ccc;
}
.content {
  flex: 1;
}
li {list-style: none;}
.controlBoxTop {
  display: flex;
  height: 5%;
  background:#999;
}
.controlBoxTop li{
  flex: 1;

}